Guillermo Luis Calvillo was found around 9:30 a.m. inside the office at 980 N. Ontario Mills Drive, just after police received a call from a neighboring business reporting that a man was lying on the ground inside, according to a police statement.

Three people identified themselves as family of Calvillo gathered outside the closed office, at 980 N. Ontario Mills Drive, Tuesday morning but said they had no comment.

Calvillo name is written on the door and a page on the Farmers Agent website lists him as an authorized agent.

“We are very sorry to hear of the situation in Ontario, and our hearts go out to the family,” said Trent Frager, spokesman for Farmers Insurance, in an email. “We are in touch with local law enforcement, and as this matter is under investigation, we must refer you to the Ontario Police Department for further information.”

Investigators found Calvillo had been shot once and was the only person inside the office, police said. It’s unclear if the shooting is being investigated as a homicide or self-inflicted.

“We have not ruled out suicide,” said Ontario police spokesman Jeff Higbee in an email.

Police are asking anyone with information to contact Detective Mike Chavez at 909-395-2925. Information can also be reported anonymously by calling WeTip at (800) 78-CRIME or online at wetip.com.